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Diagramly.

Sketch systems at the speed you think.

A hand-drawn diagram maker in your browser. Type one line or describe it to the AI, and get architecture, flowcharts, data models and cheat sheets laid out for you.

Free, with Pro at $6 a month

Opendiagramly.xyz
the story

why we made Diagramly.

I kept drawing the same boxes and arrows by hand for every design review, every interview prep session and every explainer post. Whiteboard tools made me drag and align shapes for ten minutes before I could make a point. Diagramming tools gave me something correct but lifeless.

So I built the tool I wanted: one where you type the diagram instead of dragging it, and it still looks like someone drew it with a pen. It started as a sketch line that turns A -> B -> C into a picture, then grew an AI that can draw and edit on request, presentation mode, embeds and version history.

Cheat sheets came last, and almost by accident. The same blocks that make a good architecture diagram (boxes, flows, lists, tables) also make a good one-page explainer, so a system design and a RAG cheat sheet now live on the same canvas, in the same hand-drawn style.

Diagramly is free to use with no sign-up, and your sketches stay on your device until you choose to share them.

what's inside

features.

who it's for

made for.

what it costs

Diagramly pricing.

Cancel any time from Manage billing, and Pro stays on until the end of the period you paid for. Refunds within 14 days of a charge. Payments are handled by Dodo Payments, the merchant of record, which also takes care of sales tax and invoices. See full Diagramly pricing

jump in

explore Diagramly.

good questions

Diagramly FAQ.

Is Diagramly free?

Yes. Diagramly is free to use with no sign-up, and you can keep unlimited diagrams on your device. Pro costs $6 a month or $48 a year and adds unlimited saved diagrams, 200 AI messages a day, one-click auto-layout, version history, publishing and GIF and video exports.

How do I make a diagram from text?

Type a line such as Client -> API -> Orders DB and Diagramly draws the boxes, labelled arrows and database, already laid out. Commas fan out to several nodes, braces make a decision, and names like “DB” or “queue:” pick their own shape.

Can the AI edit a diagram I already have?

Yes. Describe a system in plain words and the AI draws it, or ask for a change and it edits what’s already on the canvas. Any AI reply can be reverted in one click.

What kinds of diagrams can I make?

System architecture, flowcharts, data models, mind maps and one-page cheat sheets, all in a hand-drawn style with six looks: Paper, Notebook, Blueprint, Chalkboard, Whiteboard marker and Ink & neon.

Can I export to Mermaid, PDF or SVG?

Yes. Every plan exports to PNG, SVG, PDF and Mermaid, and exports keep the look you picked. Pro adds a GIF or video of the diagram sketching itself.

Can I embed a diagram in Notion or Confluence?

Yes. Live embeds unfurl in Notion, Confluence, docs and blogs, and view-only links work anywhere, so a diagram is published once and kept up to date.

Can I present a diagram as slides?

Press Shift+P and every frame becomes a slide that draws itself in, with no separate deck to build.

Where are my diagrams stored?

On your device. Your sketches stay there until you choose to share them or save them to your account.

How do I cancel Pro?

Cancel any time from Manage billing. Pro stays on until the end of the period you paid for, and refunds are available within 14 days of a charge.

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